ANALYSIS SETUP

This function enables the user to define forming parameters for the LS-DYNA ANALYSIS. The dialog box is shown in Figure 11.1.1.

Figure 11.1.1  The Analysis Setup dialog box

UNIT

The user can select a UNIT system by clicking the drop down button of UNIT.  As shown in Figure 11.1.2, four types of UNIT systems are available. The default UNIT system is set as <MM, TON, SEC, N>.

Figure 11.1.2  The Unit System drop down menu

DRAW TYPE

The user can select a draw type by clicking on the drop down button of DRAW TYPE to display the menu illustrated in Figure 11.1.3.

 

Figure 11.1.3  The Draw Types drop down menu

GRAVITY ONLY

No punch and die is used as the blank is deformed by gravity.

SINGLE ACTION

The die (female piece) is above the blank.

DOUBLE ACTION

The die (female piece) is below the blank.

SPRING BACK

Relieve residual stresses of deformed sheet metal part (imported DYNAIN file).

USER DEFINE

The DRAW TYPE is user defined.

SUPERPLASTIC

Simulate superplastic forming process.

 

NOTE: The defined DRAW TYPE works in conjunction with both the BLANK OPERATION/AUTO POSITION and TOOL/AUTO POSITION functions.

Figure 11.1.4  Type of contact interfaces

 

CONTACT INTERFACE

There are several types of contact interface available for an LS-DYNA stamping simulation, as listed in Figure 11.1.4.  The user can set type of contact interface between all tooling and blank. The default contact interface between blank and tooling is set as FORM ONE WAY S. TO S.

 

NOTE: Please refer to the LS-DYNA User's Manual, keyword *CONTACT, for more detailed information about each of the contact interfaces.

 

STROKE DIRECTION

The user can define stroke direction in X, Y, or Z.

CONTACT GAP

The contact gap is the minimum distance between tooling and blank after auto-positioning. The default contact gap is set to 1.0. The contact gap will be overwritten if blank thickness is defined.

DYNA SOLVER PRECISION

This option enables user to set the path of Single and Double Precision solver. User can click the  button to change the path.